Coursera offers career-advancing courses and degrees from the world's best universities like the University of Illinois, Yale, and the University of London, 100% online.

Welcome to NASA's Eyes, a way for you to learn about your home planet, our solar system, the universe beyond and the spacecraft exploring them.

This harm reduction tool helps to detect dangerous and lethal interactions in substance combinations.

Sign Learner is a free browser extension to help you learn and retain sign language whenever and wherever you go online. Browse the internet and learn sign language by hovering over highlighted words to see the corresponding sign in either ASL or BSL. Sign Learner makes it easy …

Learn for free.

A free book collecting over 100 project ideas for learning any programming language with detailed specifications and mock-ups. From CLIs to games, there's something for everyone. Don't know what to build? Browse Projectbook and get building.

Write concisely by substituting "very" + "adjective" with a more concise adjective that has the spirit of very contained within it.

Third most popular repo on GitHub with 234k stars. Free ebooks in many languages, covering a lot of subjects related to programming.

We publish activity books containing exciting puzzles and brainteasers every day! Our books are free to download and share.

Simply scroll down and dive beneath the ocean, see what lives under different depths and conditions.

You can track sharks from all over the world, and follow their movement from the latest satellite ping attached to them. OCEARCH is a global non-profit organization conducting unprecedented research on our ocean's giants in order to help scientists collect previously unattainabl…

Fast-track your developer career with our unique process, transforming you from beginner to pro in record time. Our project-based curriculum, insider perspectives, and dedicated mentorship empower driven coders to launch their dev careers in months.

Climate Change Tracker is your one-stop hub for tracking climate change, global warming, and greenhouse gas emissions. With our interactive dashboards, you can explore the latest data and insights. Share the information and make an impact! We provide indicators for policy makers…

QuizBot is an advanced AI writing tool that can help you create high-quality questions quickly and easily. Whether you need to write a quiz, a homework, a test or any other type of written content, QuizBot can assist you in generating unique and engaging solutions.

Stradr.com is a simulated stock trading platform without the barriers that others include. Stradr allows for fractional shares, aftermarket trading, currencies to reflect your location, and a better user interface that makes it easier to invest for all people, not just day trad…

A website that aims at finding all the educational resources on the web such as courses and books, but also YouTube channes and podcasts.

Explore thousands of hands-on creative classes.

It is hard to represent our spherical world on flat piece of paper. Cartographers use something called a "projection" to morph the globe into 2D map. The most popular of these is the Mercator projection. Every map projection introduces distortion, and each has its own set of pr…

Step into the past with this unique platform that provides access to a vast collection of historical maps from libraries worldwide. It's like a time machine, but instead of flux capacitors, you get beautifully detailed cartography. Looking for a Google Maps API alternative? Look…

Red Blob Games is a website that offers interactive visual explanations of math and algorithms, using motivating examples from computer games. The website has been curating game development articles since 1990 and provides free access to all articles without any signup or ads. T…